S 864-011
(3)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) P414, Left Power Distribution Center
1) 414A24, WASTE & WATER LINE HTR MN PWR
2) 414D5, WASTE & WATER LINE HTR MN PWR
S 714-012
(4)
Do a test of the heater which the thermostat controls (AMM
30-71-00/501).
(5)
Install the floor panels which you removed for access.
S 414-013
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747-400 MAINTENANCE MANUAL
IN-LINE HEATERS - REMOVAL/INSTALLATION
______________________________________
1. General_______
A. This subject has two tasks, one for the removal and one for the installation of the in-line water supply line heaters. In this procedure, you will get access to the heater, loosen and remove the heater, and install a replacement unit.
B. It is necessary to drain the potable water system before you replace an in-line heater.
TASK 30-71-07-004-001
2. In-Line Heater Removal (Fig. 401)______________________
A. References
(1)
AMM 12-14-01/301, Water System Servicing
(2)
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Lining
(3)
SSM 30-71-01
(4)
WDM 30-71-11, WDM 30-71-12, WDM 30-71-13, WDM 30-71-14
EXAMPLE IN-LINE HEATER INSTALLATION
In-Line Heater Installation
Figure 401
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747-400
MAINTENANCE MANUAL
B. Access
(1) Location Zone 125 thru 152 Lower Lobe (Refer to WDM for heater locations)
C. Procedure
S 864-002
(1) Open these circuit breakers:
(a) P414, Left Power Distribution Center 1) 414A24, WASTE & WATER LINE HTR MN PWR 2) 414D5, WASTE & WATER LINE HTR MN PWR
S 684-003
(2) Do this task: "Water System Servicing (Drain)" (AMM 12-14-01/301).
NOTE: Make sure that you release the pressure in the water system.
____
S 014-004
(3)
Remove the cargo liners or floor panels as necessary to access the in-line heater (AMM 25-52-01/401).
S 034-005
(4)
Disconnect the electrical connector from the in-line heater.
S 034-006
(5)
Loosen the B-nut on the in-line heater.
S 024-007
(6)
Pull the in-line heater out of the water line.
TASK 30-71-07-404-008
3. In-Line Heater Installation (Fig.___________________________401)
A. References
(1)
AMM 12-14-01/301, Water System Servicing
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Lining
(4)
AMM 30-71-00/501, Water Line and Waste Drain Heaters
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747-400
MAINTENANCE MANUAL
(5)
AMM 38-10-00/201, Potable Water System
(6)
AMM 38-15-00/201, Water System Pressurization
(7)
AIPC 30-71-07, Fig. 1
(8)
SSM 30-71-01, SSM 30-71-02, SSM 30-71-03
(9)
WDM 30-71-11, WDM 30-71-12, WDM 30-71-13, WDM 30-71-14, WDM 30-71-15
B. Access
(1) Location Zone 125 thru 152 Lower Lobe (Refer to WDM for heater locations)
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本文链接地址：747-400 AMM 飞机维护手册 防冰和排雨 ICE AND RAIN PROTECTION(93)
